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DIY Solar Panel Training
Posted on November 9th, 2010 in diy solar panels, solar power for homes
25 responses to DIY Solar Panel Training
oh god, don’t put your hand on it!! You are killing me here!!!
@rdcontarino1 thanks I already found the problem, I was measuring only one cell at a time, when I connected 2 of them using tabbing wire and connected tabbing wires together at each end i got 8amps+ for a cell that is rated 8amps. Rookie mistake but that’s what I am.
@hhh4932 Solar energy works only during day hours. If you want to use it in the night you need batteries (e.g. fuel-cell batteries). So far you need panels, fixed or moving frames (to catch up with the sun), power cables and one inverter. You can also have monitoring software, power optimizer and sensors to constantly monitor your power production (e.g. fire, irradiance, anti-theft devices, and so far and so forth)
@bordens47 Today photovoltaic technology to power AC devices is well established. The cost of an installation, per kWp (peak kiloWatt) is in a range of 2500-3000 USD. I’m sure you can find a lot system integrators who can satisfy your needs in your Country. If not, let me know and I’ll give you some links.
@20125150 it is a branch of R&D activities in solar technology called Concentrated Solar Power, you can find a lot on Internet. Personally I don’t think it will lead anywhere far due to some issues like temperature of the solar cells.
@inmate1943 You mean the batteries will be charged? Of course not. You mean the batteries will be discharged? If your system has bypass-diode, reverse current can be mostly avoided (but not entirely, thus draining a little bit the battery), if your system doesn’t have bypass-diode the battery will be drained a bit more but the problem is that a reverse flow of current on your solar cells will significantly reduce cell’s life and, in some circumstances, could generate fire.
@jab0805 Still quite expensive. We say “I cannot talk with someone else pocket” but are you sure it is more convenient than buying a 230W panel per month at market price? To build a panel doesn’t just require solar cells, it also require cabling, stainless steel frame, hail proof glass, it has to been made water proof, electric wiring, bypass diode among cells. An expensive solar panel could be in a range of 3$/Watt (a cheap one 1.5$/Watt). Consider it is something which will have to last years
I can get cells at 1.22$ per Watt right now on ebay. My plan is to buy and build a panel per month. Then save up for the install. I know it will take quite a long time to have enough panels to power my home, but it’s the only way I can afford to be energy independent.
@chiodeguate1 If, as said, 1.5hp is about 1000W, today the cost of a 1000W installation is about 3500 USD (4 panels 250W each). That though is the peak power production, depending on where you are you may need 1000W even in the early morning or in the late afternoon which could require you to install even an higher number of panels (as long as you need it on the daylight, if you need it in the night you need batteries). Anyway, 2000Watt, about 7000 USD and for 20years you’re done (30USD/month)
@collintheapplegeek the efficiency of solar modules decrease over time, for all solar modules. Nowadays manufacturers usually guarantee 90% of the initial efficiency after 10years and 80% of efficiency after 20years.Nevertheless the efficiency of a complex power plant is not affected just by the efficiency of solar modules but by many other factors, from plant design, to cabling to inverter efficiency,to electric mismatch to local temporary shadows (snow,sand,dirt,etc.) to all of them combined.
@PiercingKnight The specs you get from manufacturer are referred to result you can get in a specific condition (assuming you have new unused cells) which is 25°C of temperature for the cells, 1kW of solar radiation and 90° angle between cells and solar rays. If anything change, you get lower performances. Those curves of efficiency are often available also in the product brochure or data sheet.Sometimes though solar panel manufacturers sells broken cells. To check it is expensive and uneasy.
@BlueCollarSurvival Your is a very good point. Of course there is, the main aspect to consider is efficiency and duration, to preserve your investment. In my opinion the best solution is using fuel-cell technology. In this matter I was in touch with a guy a while ago in US who built a fully isolated power plant using solar modules and fuel-cell batteries on a small island in the east cost. Fuel cell technology is also used on off-shore platforms or in cellular antennas. A long subject, again.
@ELGALLO650 Which one, installing solar panels or selling solar technology or designing power plants or producing solar technology? In this days a job is A Job, no matter what you do. But there will be a huge increase of demand in the renewable energy business for jobs in all sectors in the coming year: for example today Germany employs about 350k people in this sector, I estimated a couple of days ago an increase of about 250k up to 450k in US by 2014. It is a long subject though, as always.
@hhslf it is possible but it is highly discouraged because each solar cell have different efficiency ratio and when you install together with other solar cells, the entire system will work with the efficiency of the lowest, forcing other cells to dissipate their energy by increasing their temperature thus reducing their life. This also happens when you install entire power plants and is one of the main reasons of reduction in efficiency, known as electric mismatch. It is a long subject anyway.
@jab0805 That’s interesting. Today the cost per Watt of poly-crystalline power modules with good efficiency is, for large volumes, in a range of 1.6-2 USD. Those panels are also compliant to a number of regulations which you need to satisfy in order to install those devices. Which cost can you reach by building panels by yourself?
@rdcontarino1 Thank you for the information. I will one day be energy independent. It will take time, but I plan to do it in increments. I found that by building the panels yourself, you save a quite significant amount of money. Cheers!
@jab0805 the cost per kWp today, more or less worldwide, is in between 2500 and 3000 USD. kWp means the peak production that can be reached where there is at least 1kW per square meter of solar irradiation.
It is a long calculation and there is not enough space over here, but I’m sure you can find more details on internet, otherwise let me know how can I answer you in full.
@jab0805
I’m not solar, but I am all electric. 100 amp would be my minimum… I have 200 amp box for extra room.. But we used to have 100 amp and did fine all electric baseboard heat.. Most of the amp pull is when motors start up, like the compressor on the fridge.
“This all part of the socialist NWO conspiracy to deny us our God-given right to burn as much oil as we God-damned feel like, and to drill for it wherever we God-damned please.”
(Just a foreshadow of the possible Republican takeover of the House, come Nov. 2.)
Dan, i love your videos, I have some good ideas based on your insperation.. What would you say is the best bang for the buck (solar) for about $1500.
can it save on electric bill. I am in new orleans area. thanks, Al
@jab0805 10.000-20.000 euro for a single person. that bigger the equipment (more persons) that cheaper it is per person. you can make it cheaper by building batterys and wind energy plants. the price of a solar energy plant divided by the power that it produce over 20 years (last 35-40y) is (in germany ~800-1000 kWh/kWp) approximately 25Cent/kWh. in 2013-2014 it will be cheaper that power from the grid.
This is how the renovated blocks of flats look like in Székesfehérvár,Hungary:
watch?v=-Bx4cXnKzX8
watch?v=Pvu9JC8si2w
Nearly all have undergone refurbishment,a development I wish for every city.
Did you say ” photovoltic” or ” Prophylactic” ??
@ppardee no
This would be great for an RV or marine application.
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